Trolley.



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FFICE.

PATENT TROLLEY.

SPECIFICATION forming part of Letters Patent No. 727,021, dated May 5, 1903.

Application iled March 13, 1902.

To @ZZ whom t may concern:

Be it known that I, WILLIAM S. STooK'roN, a citizen of the United States, residing in the city and county of Philadelphia and State of Pennsylvania, have invented certain new andl useful Improvements in Trolleys, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, of which- Figure 1 is a front elevation of the upper end of a trolley-pole equipped withV my invention, the parts being in the usual or normal position. Fig. 2 is a side view of Fig. 1. Fig. 3 is a section on the line Fig. 2. Fig. 4 is a top plan View of Fig. 1. Fig. 5 is a section on line y y, Fig. 4.

The lnature of this invention is a device pivotally attached to the upper end of a trolley-pole which in one-the normalposition serves to automatically-replace the trolleywheel against the wire when said wheel es-` capes from the latter and which device when run the car in the opposite direction aords a means for the ready nding of the wire.

To this end the invention comprises a yoke that is pivoted upon the trolley-pole below the usual harp, the upper ends of 'the yoke diverging from a point adjacent to the rim ofA the trolley-wheel, said yoke being maintained by gravity, in connection with asuitable stop, in such position toward the rear of the pole that its divergent ends cannot come into contact with wires that usually cross the trolleywire when the trolley-wheel is in the normal position against the trolley-wire.

The invention also comprises, in combination with said pivoted yoke, means whereby the said yoke may when required be rotated forward on its pivot to bring the said divergent ends above the plane ofthe trolley-wheel, as hereinafter more particularly' described. f

The invention alsocomprises certain details of construction hereinafter pointed out.

Referring to the accompanying drawings, 1 is the spring-pressed trolley-pole, 2 the trolley-wheel pivoted in the bifurcated harp 3, and 4: the wire with which said wheel contacts, all being of the usual construction. My device applied to this construction consists of a yoke 5, which is pivoted on a pin 6,

, then diverge outwardly, as'shown.

Serial No. 97,997. (No model.)

to the pole l just below. the harp 3. In thev present instance the head 7 is in two parts, encircling the pole and clamped thereto by bolts or screws S. Thesides of the said yoke extend substantially parallel with the sides of the harp 3; but near the end of the latter they are bent inwardly to a point a short distance within the rim of the trolley-wheel and The end of the yoke below the pivot-pin has a short arm 9, to which is secured a rope or cord 10,

vthe lower end of which extends to a point where it may be readily-reached by the conductor of the car. The weight of the forked end of the yoke 5 is such that when the pole is in the usual position shown in the drawings it (the yoke) will tend to rotate downwardly on its pivot, such movement'being, however, limited by a suitable stop, so that the divergent ends of the yoke shall be normally below the wire or at most not above the plane of the usual supporting or crossing wires. In the present instance the said movement of the yoke is limited by the upper edge 11 of the inner side of the crown 12 of the yoke stopping against the upper side of the head 7. In this connection it will be observed that vthe upper side of the head 7 is segmentally curved and that the innerside of the yokecrown 12 is a iattened surface, as clearly shown inFigs. 2 and 5, and by reason of such construction it is obvious that the edges 1l and 13 of said attened surface will contact with the curved upper side of the head 7 in both directions of movement of the'yoke 5,

thereby limiting the degree of movement of said yoke, as will appear more fully hereinafter, and thus preventing the yoke 5 swingingA too far in either direction. The yoke is therefore always maintained in proper relation to the trolley-wheel.

' Having thus described the construction of my invention I shall now explain its mode of operation as follows: Normally the parts occupy the position shown in the drawings. If now the trolley-wheel should iy off the wire, which, as is well known, not infrequently occurs, the upward throw or movement of the spring pressed pole that then takes place brings the inner side of one of the divergent ends of the yoke 5 in contact with the wire 4,

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and thus the latter will, so to say, slide along said end and be thereby guided into the peripheral groove of the wheel. Usually the said divergent ends would be of such width apart at their free extremities that except perhaps under extraordinary circumstances the wire lcould not, so to say, get outside of them. If, however, this should occur, or if and when it shall be necessary to shift the pole around so as to run the car in the opposite direction the conductor in either case suitably pulls upon the rope 10, which causes the yoke to swing upwardly on its pivot until the divergent ends of the yoke extend up above the plane of the top of the trolleywheel, whereupon by bringing the pole into a position that the wire will be anywhere between the said yoke ends and then releasing the pole the wheel willtherenpon take the usual contacting position against the wire, and the yoke will by its gravity again revert to the normal position shown.

In order to prevent the yoke under the circumstances just mentioned from swinging so far forward on its pivot as to drop forward instead of backward, I provide a suitable stop. This in the present instance is similar to the stop device for limiting the backward drop of the yoke, the lower edge 13 of the yoke-crown stopping against the head 7.

'I remark that the rope 10 may be attached directly to the pole 1 instead of to the arm 9 of the yoke, in which case the device would operate as an automatic replacer, but not as a finder.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- In a trolley, the combination with the supporting-pole thereof, and the Wheel carried thereby, of a head mounted on said pole and having its upper side segmentally curved, a yoke pivot-ally connected to said head and having divergent ends for contact with the trolley-wire, the inner side of the crown of said yoke being a attened surface to form at its edges front and rear stops, said stops being adapted to contact with the curved upper side of said head to limit the swinging of Athe yoke upon said head, and means for swinging saidyoke upon said head to project the divergent ends of the yoke above the trolley-wheel.

In testimony whereof I have hereunto affixed my signature this th day of February, A. D. 1902.

WILLIAM-S. STOCKTON.

Witnesses:

CHAs. L. BROWN, WALTER C. PUsnY. 

